SU-RV explosion-proof mine control station with transformer substation

Main station types according to downstream equipment:

  • Compact station with an automatic circuit breaker and a lighting transformer to control a shearer, a face machine, and a cooling plant

  • Compact station with an automatic circuit breaker to control a shearer and a cooling plant

  • Compact station with a transformer (P=40kVA, U=1140/660V) to control face conveyors and gate conveyors

  • Compact station to control face conveyors and gate conveyors

  • Compact station to control stowage complexes

Station circuitry provides:

  • Power contactors engagement/disengagement by a preset algorithm

  • Power contactors engagement/disengagement with de-energized power circuit (testing)

  • Compatibility with remote controls

  • Intrinsically safe inputs for external control circuits

  • Intrinsically safe outputs for power contactor status signals

In addition to the control functions, the circuitry of the station provides:

  • Short-circuit current protection of power branches

  • Overcurrent protection of power branches

  • Overheating protection of downstream equipment

  • Remote control circuit fault or short-circuit protection

  • Prevention of self-engagement at 150% of rated voltage

  • Protection against branch ground circuit failure or resistance buildup over the allowable value

  • Branch interlock in case of external line-to-ground insulation fault or drop below the allowable level

  • Current leakage protection in internal 220V power lines

  • No-voltage protection

  • Mains power indication

  • Tripping event indication

  • Branch line engagement indication

  • Protection testing

Environment conditions

Underground excavations at mines, shafts and their surface buildings with the ambient of hazardous gas and/or combustible dust

Category I explosive mixture (methane at underground works) ambient or corrosive salty dust ambient

UKhL (temperate and cold) climatic version, location category 5

Ambient temperature: minus 10°C to +40°C

Relative humidity: (98±2)% at (35±2)°C

Dust concentration in air: max. 1600 mg/m3

Main performance specifications

Property

Value

Rated feed voltage, V

1140/1000/660

AC mains frequency, Hz

50

Automatic circuit breaker rating, A

1250

Branch line insulation control unit adjustment range, kΩ

10...130

Branch line current leakage control unit adjustment range, kΩ

10...130

Power circuit current leakage trip time adjustment range, s

0.1...0.5

Ex rating

РВ Ex db [iа Ма] I Мb Х

Enclosure protection rating

IР54

Duty modes:

 

Continuous

S1

Short-time

S2

Intermittent

S3

Weight, kg

13000

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